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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/acpi/resources/rsutils.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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1 files changed, 356 insertions, 0 deletions
diff --git a/drivers/acpi/resources/rsutils.c b/drivers/acpi/resources/rsutils.c
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1/*******************************************************************************
2 *
3 * Module Name: rsutils - Utilities for the resource manager
4 *
5 ******************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2005, R. Byron Moore
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44
45#include <acpi/acpi.h>
46#include <acpi/acnamesp.h>
47#include <acpi/acresrc.h>
48
49
50#define _COMPONENT ACPI_RESOURCES
51 ACPI_MODULE_NAME ("rsutils")
52
53
54/*******************************************************************************
55 *
56 * FUNCTION: acpi_rs_get_prt_method_data
57 *
58 * PARAMETERS: Handle - a handle to the containing object
59 * ret_buffer - a pointer to a buffer structure for the
60 * results
61 *
62 * RETURN: Status
63 *
64 * DESCRIPTION: This function is called to get the _PRT value of an object
65 * contained in an object specified by the handle passed in
66 *
67 * If the function fails an appropriate status will be returned
68 * and the contents of the callers buffer is undefined.
69 *
70 ******************************************************************************/
71
72acpi_status
73acpi_rs_get_prt_method_data (
74 acpi_handle handle,
75 struct acpi_buffer *ret_buffer)
76{
77 union acpi_operand_object *obj_desc;
78 acpi_status status;
79
80
81 ACPI_FUNCTION_TRACE ("rs_get_prt_method_data");
82
83
84 /* Parameters guaranteed valid by caller */
85
86 /*
87 * Execute the method, no parameters
88 */
89 status = acpi_ut_evaluate_object (handle, "_PRT", ACPI_BTYPE_PACKAGE, &obj_desc);
90 if (ACPI_FAILURE (status)) {
91 return_ACPI_STATUS (status);
92 }
93
94 /*
95 * Create a resource linked list from the byte stream buffer that comes
96 * back from the _CRS method execution.
97 */
98 status = acpi_rs_create_pci_routing_table (obj_desc, ret_buffer);
99
100 /* On exit, we must delete the object returned by evaluate_object */
101
102 acpi_ut_remove_reference (obj_desc);
103 return_ACPI_STATUS (status);
104}
105
106
107/*******************************************************************************
108 *
109 * FUNCTION: acpi_rs_get_crs_method_data
110 *
111 * PARAMETERS: Handle - a handle to the containing object
112 * ret_buffer - a pointer to a buffer structure for the
113 * results
114 *
115 * RETURN: Status
116 *
117 * DESCRIPTION: This function is called to get the _CRS value of an object
118 * contained in an object specified by the handle passed in
119 *
120 * If the function fails an appropriate status will be returned
121 * and the contents of the callers buffer is undefined.
122 *
123 ******************************************************************************/
124
125acpi_status
126acpi_rs_get_crs_method_data (
127 acpi_handle handle,
128 struct acpi_buffer *ret_buffer)
129{
130 union acpi_operand_object *obj_desc;
131 acpi_status status;
132
133
134 ACPI_FUNCTION_TRACE ("rs_get_crs_method_data");
135
136
137 /* Parameters guaranteed valid by caller */
138
139 /*
140 * Execute the method, no parameters
141 */
142 status = acpi_ut_evaluate_object (handle, "_CRS", ACPI_BTYPE_BUFFER, &obj_desc);
143 if (ACPI_FAILURE (status)) {
144 return_ACPI_STATUS (status);
145 }
146
147 /*
148 * Make the call to create a resource linked list from the
149 * byte stream buffer that comes back from the _CRS method
150 * execution.
151 */
152 status = acpi_rs_create_resource_list (obj_desc, ret_buffer);
153
154 /* on exit, we must delete the object returned by evaluate_object */
155
156 acpi_ut_remove_reference (obj_desc);
157 return_ACPI_STATUS (status);
158}
159
160
161/*******************************************************************************
162 *
163 * FUNCTION: acpi_rs_get_prs_method_data
164 *
165 * PARAMETERS: Handle - a handle to the containing object
166 * ret_buffer - a pointer to a buffer structure for the
167 * results
168 *
169 * RETURN: Status
170 *
171 * DESCRIPTION: This function is called to get the _PRS value of an object
172 * contained in an object specified by the handle passed in
173 *
174 * If the function fails an appropriate status will be returned
175 * and the contents of the callers buffer is undefined.
176 *
177 ******************************************************************************/
178#ifdef ACPI_FUTURE_USAGE
179acpi_status
180acpi_rs_get_prs_method_data (
181 acpi_handle handle,
182 struct acpi_buffer *ret_buffer)
183{
184 union acpi_operand_object *obj_desc;
185 acpi_status status;
186
187
188 ACPI_FUNCTION_TRACE ("rs_get_prs_method_data");
189
190
191 /* Parameters guaranteed valid by caller */
192
193 /*
194 * Execute the method, no parameters
195 */
196 status = acpi_ut_evaluate_object (handle, "_PRS", ACPI_BTYPE_BUFFER, &obj_desc);
197 if (ACPI_FAILURE (status)) {
198 return_ACPI_STATUS (status);
199 }
200
201 /*
202 * Make the call to create a resource linked list from the
203 * byte stream buffer that comes back from the _CRS method
204 * execution.
205 */
206 status = acpi_rs_create_resource_list (obj_desc, ret_buffer);
207
208 /* on exit, we must delete the object returned by evaluate_object */
209
210 acpi_ut_remove_reference (obj_desc);
211 return_ACPI_STATUS (status);
212}
213#endif /* ACPI_FUTURE_USAGE */
214
215
216/*******************************************************************************
217 *
218 * FUNCTION: acpi_rs_get_method_data
219 *
220 * PARAMETERS: Handle - a handle to the containing object
221 * ret_buffer - a pointer to a buffer structure for the
222 * results
223 *
224 * RETURN: Status
225 *
226 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
227 * object contained in an object specified by the handle passed in
228 *
229 * If the function fails an appropriate status will be returned
230 * and the contents of the callers buffer is undefined.
231 *
232 ******************************************************************************/
233
234acpi_status
235acpi_rs_get_method_data (
236 acpi_handle handle,
237 char *path,
238 struct acpi_buffer *ret_buffer)
239{
240 union acpi_operand_object *obj_desc;
241 acpi_status status;
242
243
244 ACPI_FUNCTION_TRACE ("rs_get_method_data");
245
246
247 /* Parameters guaranteed valid by caller */
248
249 /*
250 * Execute the method, no parameters
251 */
252 status = acpi_ut_evaluate_object (handle, path, ACPI_BTYPE_BUFFER, &obj_desc);
253 if (ACPI_FAILURE (status)) {
254 return_ACPI_STATUS (status);
255 }
256
257 /*
258 * Make the call to create a resource linked list from the
259 * byte stream buffer that comes back from the method
260 * execution.
261 */
262 status = acpi_rs_create_resource_list (obj_desc, ret_buffer);
263
264 /* On exit, we must delete the object returned by evaluate_object */
265
266 acpi_ut_remove_reference (obj_desc);
267 return_ACPI_STATUS (status);
268}
269
270/*******************************************************************************
271 *
272 * FUNCTION: acpi_rs_set_srs_method_data
273 *
274 * PARAMETERS: Handle - a handle to the containing object
275 * in_buffer - a pointer to a buffer structure of the
276 * parameter
277 *
278 * RETURN: Status
279 *
280 * DESCRIPTION: This function is called to set the _SRS of an object contained
281 * in an object specified by the handle passed in
282 *
283 * If the function fails an appropriate status will be returned
284 * and the contents of the callers buffer is undefined.
285 *
286 ******************************************************************************/
287
288acpi_status
289acpi_rs_set_srs_method_data (
290 acpi_handle handle,
291 struct acpi_buffer *in_buffer)
292{
293 struct acpi_parameter_info info;
294 union acpi_operand_object *params[2];
295 acpi_status status;
296 struct acpi_buffer buffer;
297
298
299 ACPI_FUNCTION_TRACE ("rs_set_srs_method_data");
300
301
302 /* Parameters guaranteed valid by caller */
303
304 /*
305 * The in_buffer parameter will point to a linked list of
306 * resource parameters. It needs to be formatted into a
307 * byte stream to be sent in as an input parameter to _SRS
308 *
309 * Convert the linked list into a byte stream
310 */
311 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
312 status = acpi_rs_create_byte_stream (in_buffer->pointer, &buffer);
313 if (ACPI_FAILURE (status)) {
314 return_ACPI_STATUS (status);
315 }
316
317 /*
318 * Init the param object
319 */
320 params[0] = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER);
321 if (!params[0]) {
322 acpi_os_free (buffer.pointer);
323 return_ACPI_STATUS (AE_NO_MEMORY);
324 }
325
326 /*
327 * Set up the parameter object
328 */
329 params[0]->buffer.length = (u32) buffer.length;
330 params[0]->buffer.pointer = buffer.pointer;
331 params[0]->common.flags = AOPOBJ_DATA_VALID;
332 params[1] = NULL;
333
334 info.node = handle;
335 info.parameters = params;
336 info.parameter_type = ACPI_PARAM_ARGS;
337
338 /*
339 * Execute the method, no return value
340 */
341 status = acpi_ns_evaluate_relative ("_SRS", &info);
342 if (ACPI_SUCCESS (status)) {
343 /* Delete any return object (especially if implicit_return is enabled) */
344
345 if (info.return_object) {
346 acpi_ut_remove_reference (info.return_object);
347 }
348 }
349
350 /*
351 * Clean up and return the status from acpi_ns_evaluate_relative
352 */
353 acpi_ut_remove_reference (params[0]);
354 return_ACPI_STATUS (status);
355}
356